Diamond tool assembly



Jan. 8, 1952 J. LOECY, JR 2,581,544

DIAMOND TOOL ASSEMBLY Filed Nov. 29. 1948 INVEN TOR.

several elements;

Patented Jan. 8, 1952 UNITED STATES PATENT OFFICE DIAMOND TOOL ASSEMBLY Joseph Loecy, Jan, Euclid, Ohio Application November 29, 1948; Serial No. 62,449

1. Claim. 1-25-41) The present invention relates to an improved assembly of v diamond tool for dressing, grinding wheels.

Asis of course well known tothose who are familiarwith the art to which the present invention relates, a diamond toolismovedat intervals into position for operative engagement with a grinding'wheelfor dressing the same; and-it has been the usual practice in the past to depend upon the workman to turn the diamond tool at certain interval'sinlorderrto alwayspresent a new sharp point! and to prevent the diamondi from wearing unevenly and thereby lengthen the life of the same; Experience; has shown, however, that the workmenxfailto make such: adjustments with the necessary regularity and to the proper degree if. at. all- It is therefore the object of the present invention to devisean assembly in which the diamond tool may be moved to position foroperative engagement with the grinding wheel: and at the same time be automatically turned slightly so as to always present anew sharp point of the diamond to the wheel and prevent uneven wear of the diamond;

A more specific object is to devise an assembly with hydraulic means for moving the diamond tool into position for operative engagement with the" grinding wheel and for simultaneously turning the diamond tool slightly so as to always present a new point of the diamond to thegrinding wheel and thus ensure against uneven wear of the diamond.

A still more specific object of my present invention is to devise a piston and cylinder assembly in which the diamond tool may be mounted upon either the piston or the cylinder and in which there may be employed hydraulic means for effecting relative longitudinal movement between the piston and cylinder for moving the diamond tool into and out of position for operative engagement with the grinding wheel and for simultaneously turning the diamond tool slightly during either its movement towards or away from the grinding wheel for the purpose of ensuring against uneven wear of the diamond and so as to always present a new point of the diamond to the grinding wheel.

. Other objects will appear from the following description and claim when considered together with the accompanying drawing.

Fig. 1 is a perspective view of my present improved device;

Fig. 2 is a side elevation of the same, with part broken awaylso as to show the relation of the Fig. 3is an endelevation thereof; and

Fig; 4 is a distended view of some of the parts in perspective;

It is to be understood that the present form of disclosure is merely for the purpose of illustration andthat there might be devised various modifications thereof without departing from the spirit of my invention asherein set forth and claimed.

My'present'assembly may be mounted upon or attached to any type of grinder by means of the rearwardly extending shank portion 2 of the cylinder member I. The cylinder member I has a restricted cylindrical portion 3 for accommodation of the shaft 4 of the plunger or piston 5 which is of larger diameter and is adapted to be received by thecorrespondinglylarger cylindrical portion 6 of the-cylinder member I. The cylindrical portion 3 is provided with the annular groove I'for an oil seal.

In: the forward end of the shaft 4 there is mounted the diamond tool 8 with the diamond point 9; and thistool may be removably mounted. by" means of the screw-threaded engagement indicated at H];

At diametrically opposite points of the cylinder member I there are attached by means of screw-threaded engagement the two oil tubes H and: I2, one of which has'constant communication with the annular groove l3 provided about the perimeter of the plunger or piston 5,.while theother; tube 12 has: communication with the chamber: 6 at the'forward side of the piston 5. Upon the edge of the piston 5, the groove 13 may have a plurality of inclined straight ducts or grooves l4 leading therefrom so as to open into the cylindrical chamber E in directions towards spaced points about the end of the cylinder 6. The purpose of these annular and inclined grooves is to introduce oil under pressure therethrough so as to cause the same to be impinged in an inclined manner against the knurled groove 15 in the end of the chamber 6 and thereby give the piston a compound movement, that is simultaneously along the cylinder and rotatively therein. From the groove IS the ducts I511 will permit the oil to pass into the central well [5b so as to prevent any interference of this oil with the turning of the piston 5. Thus, during the initial period of operation, the jets of oil from the ducts l4 may be impinged effectively against the bottom of the groove [5 so as to efiect turning of the piston 5. This turning of the piston. may be provided for either the forward or rearward movement oftlieg same and theducts or grooves I may be arranged accordingly. In either case,

for operative engagement with the grinding wheel; and the groove I3 will be so positioned and oi such width that it will always be in communication with the inner end of the tube I 2 so as to always permit introduction of the'oil' thereinto and therefrom as may bedesired in accordance with the operation herein set forth.

In actual operation of this device, suitable pressure will be supplied to either of the tubes I I and I2, as may be desired to move the diamond tool out of operative position with respect to the grinding wheel or into such position. For this purpose, the tubes II and I2 may'have an oil pump I6 which may be connected through'the hand-operated valve IT with either of the tubes I I and I2, as may be required, by merely manipu lating this valve. That is to say, by means of the valve I! the pump pressure may be applied to M the tube I2 for moving the piston forwardly and at the same time turning it slightly so as to present a fresh point of the diamond for dressing the grinding wheel. So long as the valve I1 is held in that position, the diamond tool will be only one direction and for holding the same in held in such dressing position; and thus it may be said that the diamond tool is moved forwardly, turned and held in such operative position by a unitary hydraulic means. It is to be understood tool will be moved into dressing position whenever desired during those periods when there is no grinding taking place. It will be understood also that for the purpose of moving the diamond tool into and out Of operative position with respect to the grinding wheel, only a slight extent of movement is necessary. Likewise, it is most desirable that each turning movement of the diamond'tool be of only very slight extent.

This invention may be embodied as part of a machine which has a hydraulically operated dresser and in which there is already provided an oil pump and in which there may be automatic operation of the valve instead of the hand manipulation above described.

What I claim is:

In a device of the class described, the combination of a cylinder, a piston having straightline movement within said cylinder, a dressing tool carried by said piston, said cylinder having supply connections for application of hydraulic pressure to either end of said piston chamber for moving said piston either forwardly or rearwardly therealong, a valve in said supply conthat the hydraulic pressurewill force the piston to the end of the chamber 6 and hold it thereagainst. Then, upon completion of the dressing operation, the valve Il may be adjusted so as to apply the oil pressure to the other tube II and its corresponding side of the piston 5, while at the same time relieving the pressureupon the nections for determining the application of the hydraulic pressure individually to one or the other end of said piston, hydraulic means including an annular duct provided in said piston and i auxiliary ducts inclined therefrom towards one end of said cylinder and operative only during straight-line movement of said piston for thereby eiiecting simultaneously a rotative movement of said piston and dressing tool predominantly in such changed position with relation to the work.

JOSEPH LOECY, JR.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED sTATEs PATENTS Ginter July 16, 1946 

